Apparatus for obtaining pulverized coal



T. E. MURRAY APPARATUS FOR OBTAINING PULyERIzED COAL Feb. 12, 1929.

Filed June 12, 1925 gnve/ncoz Thomas E. M11/my Cil Patented Feb. l2, 19259.

einen THOMAS MURRAY,

on New Yonai, nl Y.

APPARATUS FR OBTANING PULVERZED CGAE.

.Application filed lTune 12,

My .invention aime to provide certain iinprovoments; hy which coul een he produced econol'ziicully in. pulverir/.ed or linely ground condition.

The accompunying drawing-.e i lluetrute dieggunnnzrticully an embodiment ot the in vention.

Fig. l is n cross-section partly in ele 'ration 5.

Fig. 2 is u central longitudinal sertion;

Fig. 3 is a plan.

Rolls or other common crushing device@ are used to crush the materiel to Goeree und fine condition and the liner particles; :1re drawn olif in e current ot' air or other' fluid.

In the exemple shown, two paire oi' crushing' rolle A. and B are arranged one above the other. rlhe coal in lumps or similar itorm from u hopper C paseos between the hrst pair of rolle und is; crushed so that. part ot it emerges; in a finely di'f'ided state und the bulirnce more coareely divided. For eome Coeli; onlj,7 one mir ot rolle ie Sutlicient, hut l prefer to use two or more paire ee shown. The materiel from the tiret pair of rolle A pztses; through a. Second pair ot' rolls B, more closely spaced so as Ato again crush it to Coareer and finer particles.

'l' he coerser particles after passing the lest rolls drop ou to u. chute or plete D hy whieh they ure conveyed or guided to the lower end o1. :1 serew conveyor lr] hy which thel7 are lifted und (lil-:elnrrgml :Lenin through u chute F into the hopper C. The Coereer particles: ure thue circulated through the crushing meehine sind repleniehed as required with new materiel ted into the hopper C to the place of the pulverized portion. withdrawn in the mal-nner hereinafter deeerihed. Any usuel or suitable geert: or other driving; ineens muy he used for the rolls. and also any usual or suitable heuringe adjustable to Very the specie between the rolle und to yield and to permit their separation in case pieces ot metal or other large and hard materiel should enter between the rolle.

As the material tells through the crur'ih ing mechanism the finely crushed particles are withdrawn by Ineens 0I" a Current of air.

1923. Serial No. 644,838.

An exhaust tan Gr hue en inlet pipe H communicatino.` with :L port ,l ut one Lide ot the casing. The raming ie nir-de up oit u eylind ricul well le with end welle i.. und M. The exhaust fun hueA its .inlet through. the wall L. .lhere ie also au opening N in the end well M neur the bottoni ot the casing for edmiseion of The fun G disch-urges through e pipe H to any defsired reeeptaele. rlhe air pees," through the crushing mechanism carriesL il euepeneion the liner particles of inuteriul deeired. The fen. und the several openingge1 orporte described would he varied in proportions so as to carry purticlefs of the desired tineuese und to permit the cour-eer particles to fell to the bottom and to he passed again through the crushing` infcl'ienism.

Any type ot rolls may he used. that is with plain, serrated or spiked eurjlectes und proportioned und spaced according; to cir cumetences; or, Various other usual or suitehle crushing` devices may be used. Also ifurioue mechanisme may he used for producing the flow of air or other fluid through the materiel cruehed by Suid mechanism to withdraw the finer particles therefrom.

The invention not being limited to u purticuhir eruehingv mechanism, or to e pzuticulur fen or pump for creating' the fluid f'urrent rlefiii'e.d, it is deemed unneeeeemfy to illustrate these mechanisme in detail; the diagrum Shown heing; sulicient to make clem' the tjy'pe of apparatus und 'the method ot ohtei'uinn' the deeired produet.

Vif/hat l claim ie: i

An uppzufetue for obtaining pulverized coul comprieingr. in. comllnetion a pair oi? crushing; mechanisms und means for admitting' uir helow vthe Second crushing mechanism und withdrawing' it between the two crushing mechanisms to recover the fine product from the second crushing mechenism and also from the ln witneee whereof, l have hereunto signed my neme.

THOMAS E. MURRAY. 

